Muffler for gas-engines.



PATENTED OUT. 15, 1907.

J. B. HOOVER.

MUFFLER FOB. GAS ENGINES.

APPLICATION II LED FEB-16, 1906.

INVENTOR WITNESSES ATTORNEYS I vice of UNITED STATES PATENT OFFICE.

JACOB B. HOOVER, OF COLUMBUS, OHIO.

MUFFLER FOR GAS-ENGINES.

Application filed February 16,

Specification of Letters Patent.

Patented Oct. 15, 1907.

1906. Serial No. 301,362.

To all whom it may concern.-

Be it known that I, JACOB B. HoovER, a citizen of the United States,residing at Columbus, in the county of Franklin and State of Ohio, haveinvented certain new and useful Improvements in Muffiers forGas-Engines, of which'the following is a specification.

My invention relates to new and useful improvements in mufflers for gasengines.

The object of the invention is to provide a muflier more especiallydesigned for air cooled engines, in

which air is conveyed along the exhaust pipe.

Another feature resides in rotatable means disposed within the mufflerand arranged to be driven by the exhaust from the engine, with theresult that a suction is createdrwhich tends to draw the air so that acirculation about the cylinder and the exhaust pipe is had.

Finally the object of the invention is to provide a dethe characterdescribed that will be-strong, durable and efficient and one in whichthe several parts will not be liable to get out of working order.

With the above and other objects in view, the invenconstruction andoperation, a preferable embodiment of which is described in thespecification and illustrated in the accompanying drawings, wherein:

Figure 1 is alongitudinal vertical sectional view of my improvedmufiier, also showing a portion of th'e'exhaust-pipe, and air conductingtube, Fig. 2 is a transverse vertical sectional view taken on the lineas x and looking toward the 'exhaust pipe, and, Fig. 3 is a transversevertical sectional view taken on the line y y of Fig. '1, and lookingtoward the discharge end of the muffler. I v

In the drawings the n moral 1 designates the muffler which is preferablycylindrical in shape, being closed at each end by disk plates or heads 2and 3. -These heads are each formed with circular rows of openings 4 and5 respectively. The inner head 3 is provided with a screw threadedopening 6 in which'is threaded the end of the exhaust pipe 7 of anexplosive engine (not shown). This exhaust p pe is surrounded by asomewhat larger air conducting tube 8; which is secured to the ends ofthe muffler by any suitable means as screws 9. The openings 5 inthe head3 are so disposed as to permit the air in the tube 8 to freely passtherethrough to the muffler casing 1.

Centrally within the casing 1 a longitudinal shaft 10 I is disposed. Theshaft is provided with a reduced portion 11 and a shoulder 12, whichreduced portion passes through an opening 13 in the head 2, while theshoulder 12 abuts the inner side of the same, a suitable bearing knownmanner.

cape through the openings 4 in the head 2.

being thus provided. At its opposite end the shaft is also provided witha shoulder 14 and has suitable bearing in a spider 15 which the shoulderabuts. The spider is secured at its opposite ends to the inner surfaceof the casing 1 by any suitable means as screws 16 passed through thecasing from the outside thereof. By provision of the shoulders endthrust and longitudinal displacement of the shaft is obviated, while atthe same time it is permitted to freely revolve. Secured on the shaftand projecting therefrom within a short distance of the inner surface ofthe casing are blades or paddles 17 and 18, the said blades beingarranged in sets of four each, or any other suitable combination.However, in the present instance, the blades 18 project from the shaftat points substantially forty-five degrees from the blades 17, thepurpose of which will be hereinafter brought out. The reduced end 11 ofthe shaft is extended a short distance beyond the head 2 and a fly orbalance wheel 19 mounted thereon, which assists in the revolution of thepaddles by the shaft. It is to be noted that the blades 17 and 18 aredisposed at an angle and inclined away from the head 3 through which theexhaust and air are admitted. y

The operation of the device is as follows: The exhaust gases from theengine enter the muffler casing 9 and causes the shaft 10 to revolvewhen said gases strike against the blades 17. Thevrotation of theseblades create a suction in the mufller casing which tends to draw theair from the tube 8. This tube is connected to the air-jacket of theengine in the usual and well A circulation of air is accordingly set upin said tube and about the cylinder of the engine. Theair and gasesafter passing through the casing es- It is obvious that after the shaftis set in motion, the momentum gained by the balance wheel 19, willmaterially assist in keeping up the revolution of the shaft. I wish itclearly understood that I use no manual or mechanical power in revolvingthe shaft 10, but depend solely upon the force of the exhaust gtses asthey strike up with an exhaust pipe of an explosive engine ot a mufllercasing-into which said exhaust pipe discharges, a an mounted in saidcasing and adapted tohave movement imparted thereto by the force of saidexhaust, an air conduit which is also in communication with said casing,

said cas- I cuiation of air in the air conduit.

10 the exterior of the leasing, an air conduit which surrounds Y theexhaust pipe and which is also in communication with the interior of thecasing, and said casing having openings formed in the end thereofopposite the end at which, the

exhaust pipe is connected.

In testimony whereof I afliiz my signature in presenceof 15 twowitnesses. JACOB B. HOOVER. Witnesses:

A. L. PHELPS, M. B. SCHLEY.

